Dip about right for dipso (5)
I believe the answer is:
drunk
'for dipso' is the definition.
(dipso can informally mean an alcoholic)
'dip about right' is the wordplay.
'dip' becomes 'dunk' (synonyms).
'about' is an insertion indicator.
'right' becomes 'r' (common abbreviation).
'dunk' going around 'r' is 'DRUNK'.
(Other definitions for drunk that I've seen before include "Inebriated" , "Pickled (sl.)" , "Wino" , "Toper" , "Intoxicated" .)